Ask Question
15 May, 04:01

Consider a steady-state experiment in which the observed current due to reduction of Ox to R is 85 mA/cm2. What is the concentration gradient at the electrode surface? Knowing that the concentration of the species being reduced is zero at the electrode surface, and 0.10 mM in the bulk, how thick is the diffusion layer in this experiment?

+1
Answers (1)
  1. 15 May, 07:02
    0
    Answer: Yes

    Explanation:

    Surface Concentration: In electrochemistry, there is an important distinction between the concentration of a species at the electrode's surface and its concentration at some distance from the electrode's surface (in what we call the bulk solution). Suppose we place an electrode in a solution of Fe3 + and fix the potential at 1.00 V. At this potential Fe3 + is stable-the standard state reduction potential for Fe3 + to Fe2 + is + 0.771 V, the concentration of Fe3 + remains the same at all distances from the electrode's surface.

    Bulk Concentraton: If we change the electrode's potential to + 0.500 V, the concentration of Fe3 + at the electrode's surface decreases to approximately zero. The concentration of Fe3 + increases as we move away from the electrode's surface until it equals the concentration of Fe3 + in bulk solution. The resulting concentration gradient causes additional Fe3 + from the bulk solution to diffuse to the electrode's surface.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Consider a steady-state experiment in which the observed current due to reduction of Ox to R is 85 mA/cm2. What is the concentration ...” in 📙 Engineering if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers